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<br /> TABLE 2 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE,STOCKTON,CALIFORNIA
<br /> Casing Depth Groundwater LPH Concentration Oµg/L)
<br /> Well Elevation to Water Elevation Thickness Ethyl- - �-
<br /> Number Date _ (feet) (feet) (feet (feet) Benzene Toluene _ benzene Xylenes TPH-g MTBE
<br /> RWI 04/30/92 905 -- -- -- -- -- -- -- --
<br /> RWI
<br /> -RW1 08/13/92 905 3393 -2488 0 00 4,700 19,000 2,500 12,000 92,000
<br /> RWI 10/08/92 905 3448 -2543 000 2,200 8,400 1,500 6,600 52,000 --
<br /> RWI 02/23/93 905 3169 -2264 000 1,800 4,100 1,000 3,900 26,000
<br /> RWI 05/18/93 9 05 2974 -2069 000 1,900 7,800 1,300 5,000 36,000 --
<br /> RWI 08/22/93 9 05 3003 -2098 000 1,800 7,600 1,500 5,800 39,000 --
<br /> RWI 12/30/93 905 2938 -2033 000 1,600 2,400 1,300 3,700 20,000 --
<br /> RWI 02/17/94 905 2897 -1992 000 1,000 4,000 1,100 3,600 26,000
<br /> RWI 05/10/94 9 05 2853 -1948 000 1,200 5,300 1,400 5,000 34,000
<br /> RWI 08/02/94 905 2995 -2090 000 1,300 4,700 1,400 4,800 28,000 --
<br /> RWI 11/01/94 905 3034 -2129 000 1,100 4,600 1,300 4,600 28,000 --
<br /> RWI 02/17/95 905 2782 -1877 000 820 3,600 1,200 3,900 24,000 --
<br /> RWI 0511 l/95 905 25 13 -1608 000 780 4,000 1,300 4,300 32,000 --
<br /> RWI 08/24/95 905 2641 -1736 000 820 4,000 1,500 4,600 24,000 --
<br /> RWI 10/19/95 905 2685 -1780 000 680 3,100 1,200 3,600 25,000 <250
<br /> RWI 02/13/96 905 22 70 -1365 000 590 2,900 920 2,700 21,000 --
<br /> RWI 04/18/96 905 2229 -1324 000 510 2,500 980 2,700 23,000 <100
<br /> RWI 08/08/96 9 05 2344 -1439 000 600 3,200 1,200 3,500 20,000 <250
<br /> RWI 11/04/96 9 05 2381 -1476 000 710 2,600 1,200 3,200 23,000 900
<br /> RWI 02/03/97 9 05 1963 -1058 000 390 1,900 680 2,000 16,000 440
<br /> RWI 05/08/97 770 1976 -12 06 0 00 430 2,000 860 2,300 18,000 620
<br /> RWI 08/26/97 770 2051 -1281 000 600 2,600 1,200 3,400 21,000 380
<br /> RWI 11/11/97 770 21 11 -1341 000 410 1,500 750 1,800 13,000 520
<br /> RWI 11/11/97 770 <25*
<br /> RWI 03/03/98 770 1551 -7 81 000 320 1,300 660 1,700 11,000 420
<br /> RWI 03/03/98 770 <33*
<br /> RWI 05/20/98 770 1530 -760 000 310 1,500 670 1,800 13,000 760
<br /> RWI 05/20/98 770 <33*
<br /> RWI 08/19/98 770 1675 -9 05 000 340 1,200 630 1,700 18,000 1,100
<br /> RWI 08/19/98 770 <40*
<br /> RW1 11/18/98 770 1721 -951 000 250 840 520 1,100 8,200 90
<br /> RWI 03/30/99 770 1531 -7 61 000 197 678 432 967 81150 <20
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